# Bootstrap Standard Errors (Cluster by Country)

| Dep Var | Variable | Original Coef | Original SE | Bootstrap SE | Boot 2.5% | Boot 97.5% | Boot p | Sig |
|---|---|---|---|---|---|---|---|---|
| log(patents) | Z_1 | -6.9098 | 3.2132 | 6.5489 | -19.3232 | 4.5678 | 0.5320 |  |
| log(patents) | Z_2 | 1.1830 | 0.4786 | 0.8799 | -0.3804 | 2.8933 | 0.3040 |  |
| log(patents) | Z_3 | -0.0484 | 0.0195 | 0.0330 | -0.1134 | 0.0106 | 0.1960 |  |
| High-tech exports % | Z_1 | -75.2644 | 29.8131 | 42.1743 | -182.5277 | -8.6709 | 0.0160 | ** |
| High-tech exports % | Z_2 | 10.4690 | 4.2857 | 6.2084 | 1.0166 | 26.7654 | 0.0200 | ** |
| High-tech exports % | Z_3 | -0.3884 | 0.1698 | 0.2481 | -1.0406 | -0.0142 | 0.0360 | ** |
| Patents/million | Z_1 | -2234.5947 | 1196.5612 | 1541.4836 | -5885.1923 | 132.4041 | 0.0920 | * |
| Patents/million | Z_2 | 355.4201 | 178.2316 | 239.9593 | -23.8206 | 917.6147 | 0.0960 | * |
| Patents/million | Z_3 | -13.9983 | 7.2627 | 9.6167 | -36.3710 | 1.3539 | 0.0960 | * |
| R&D/GDP | Z_1 | 1.7091 | 1.0913 | 0.8421 | 0.0760 | 3.2836 | 0.0440 | ** |
| R&D/GDP | Z_2 | -0.2685 | 0.1558 | 0.1231 | -0.5220 | -0.0216 | 0.0400 | ** |
| R&D/GDP | Z_3 | 0.0131 | 0.0062 | 0.0051 | 0.0027 | 0.0238 | 0.0080 | *** |